Telephone-transmitter



(No Model.) V

. J. W. BONTA.

TELEPHONE TRANSMITTER. No. 365,776. Patented July 5, 1887.

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UNITED STATES PATENT rr cn,

JAMES \V. BONTA, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE AMERICANNATIONAL TELEPHONE COMPANY, OF NEW" YORK.

TELEPHONE-TRANSMITTER.

ESPECIPIC'ATION forming part of Letters Patent No. 365,776, dated July5, 1887. Application filed October 21, 1886. Serial No. 216,793. (Nomodel.)

To aZZ whom it may concern:

Be it known that I, JAMES WV. BONTA, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inTelephonic Transmitters, of which the following is a specification,reference being had therein to the accompanying drawings, wherein-Figures 1 and 2 are vertical sections showing my improvements.

My invention has relation to the form of telephonic transmitters shownand described in Letters Patent of the United States No 333,816, anddated January 5, 1886, or that wherein a loose or rolling electrode issupported upon an inclined block or plate, and it has for its objectsimplicity of construction and arrangement of parts to produce aninexpensive, compact, and durable form of transmitter, as well as tointensify the impulses sent into the line for obtaining better workingeffects. v

My invention accordingly consists of the combination, construction, andarrangement of parts, as hereinafter described and claimed, havingreference particularly to locating the carbon block or inclined plateand loose or rolling electrode within the bore of the primary coil ofthe inductorium to make the transmitter more compact, and to increasingthe diameter of the coils of the secondary of the inductorium andseparating it more or less from the primary coil, which construction hasthe effect of producing in the secondary more intense impulses fortransmission to the line, and consequently more distinctarticulation atthe receiving end of the line.

In the drawings, A represents a suitable form of transmitter boX orcasing having a hinged front or removable door or cap, a, provided witha mouth-piece, a, and diaphragm B, with or without electrode 1).

0 represents the secondary coil of the inductorium I, and E the primarycoil of same.

.The former is of a diameter relatively larger than that of the latter,so that the primary coil can be placed at an angle or inclined withinthe bore of the spool c for the secondary, as shown.

e. I prefer, however, for convenience ofmalc ing or building up saidcore and placing it in position, to insert within the bore of the spoole a second spool, H, having a shoulder, h, at one.end, and shellacing orotherwise securing the wires forming core 6 to the outside surface ofspool H, as shown in Fig. 1. Theprimary coil or its spool may befastened to back of the box, or the closed end of spool H may be securedto the back of the box A, to keep it and the primary, as well as theblock Fin afixed, position, or the primary may be loosely pivoted orconnected to said back or to a lug, k, thereon, and have a set or thumbnut, for retaining it in position, as shown in Fig. 2. Thislast-dcscribed construction admits of ad justing the inclination of theprimary coil and block F to vary the degree of initial contact betweenthe electrodes.

I do notlimit myself to any size ordiameter of spool c for the secondarycurrent, as it may be made large, as shown in Fig. 1, or just largeenough to admit of inclining the primary coil within it, as shown inFig. 2,

To prevent the ball or electrode G falling out of the bore of theprimary coil when the lid a is removed, a metal spring or flexiblestrip, g, of card-board or other suitable material, is secured to thefront end of the spool for the primary coil and arranged to project intothe path of the electrode, as shown in Fig. 2.

I do not herein claim the relative or proportionate sizes or diametersof the primary and secondary coils of the inductorium I, as this formsthe subject-matter of a separate application.

If desired, the position of the primary and secondary coils may bereversed'-that is, the secondary is the inner and the primary the outercoil; but the results obtained from this disposition of the coils is notas intense as IOC those obtained from the coils when arranged as firstabove described.

The electrodes 12 G, and preferably plate or block D, are in the primaryof the inductorium I, which includes a battery, 2, and its secondary Gis part of the line.

What I claimis 1. In a telephonic transmitter, the combination of aninduction-coil having in its bore a loose or rolling electrode, adiaphragm in contact with said electrode, and circuit-connections,substantially as set forth.

2. A telephonic transmitter having a diaphragm, an induction-coil havinga hollow or tubular core, a rolling electrode within the bore of saidcore and in contact with the diaphragm, substantially as set forth.

3. In a te1ephonic transmitter, adiaphragm, an inductioncoil having itsprimary in an inclined position within the bore of the secondary, aloose or rolling electrode within the bore of the primary and in contactwith the diaphragm, substantially as set forth.

4. In a'telephonic transmitter, an inductorium having its primary coilin an inclined position within the secondary coil, a carbon block andloose or rolling electrode within the bore of the primary coil, and adiaphragm in contact with the rolling electrode, substan' tially as setforth.

5. In a telephonic transmitter, the combination of an induction-coilhaving a tubular core, a block,,F, in said core, a rolling elec-' trodeon said block, and a diaphragm in contact with said electrode,substantially as set forth.

6. A telephonic transmitter having an inductorium, the bore of theprimary coil of which forms an inclined table for a loose or rollingelectrode, and means for altering the inclination of primary,substantially as set forth.

7. A telephonic transmitter having an inductorium the primary of whichis separate from the secondary, a pivoted support for the primary, andadjusting devices for placing and inclining the primary Within the boreof the secondary and for varying its inclination, a loose or rollingelectrode in the bore of the primary, and adiaphragm in contact withsaid electrode, as set forth.

In testimony whereof I affix mysignature in presence of two witnesses.

JAMES W. BONITA.

Witnesses:

S. J. VAN STAVOREN, J. DANIEL EBY.

